解:方程为9(x+1)²-(2x+5)=0,化为9(x²+2x+1)-2x-5=0,9x²+18x+9-2x-5=0,9x²+16x+4=0,x²+16x/9+64/81=28/81,(x+8/9)²=28/81,得:x=-8/9±2√7/9